Designed for use on the FR500S & will fit any 2005-2009 Mustang V8. Features a throaty, snarl & is a little quieter than other FRPP axle backs. Best of all this system no highway speed (2000 rpm) drone. Includes mufflers with Ford Racing embossed 3.5" exhaust tips. Aluminum 409 stainless steel, corrosion resistant body, with polished tips.